Plumbing Isolation Valve Control for Water Pressure Extremes
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Solution Overview
Problem
Existing plumbing systems lack effective isolation from potable water sources during water pressure extremes, leading to contamination and the need for costly purging and boiling water advisories, with current solutions failing to automatically protect against both low and high pressure issues.
Innovation Solution
An isolation device with first and second water pressure sensors, a flow sensor, and a controller that controls a main valve to isolate the plumbing system from the water supply line based on pressure measurements, ensuring the system remains isolated unless demand for water exists and permissible pressure parameters are met, while also providing a purging mechanism and alert system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a check valve or back-flow preventer is installed to prevent water drainage, then water contamination is reduced, but the system cannot protect against high pressure extremes and requires periodic inspection
Solution Approach 1:
The isolation device combines multiple functions into a single unit: it acts as a check valve to prevent backflow, a pressure regulator to protect against high pressure extremes, and an automated isolation system. The controller integrates pressure sensing, flow detection, and valve control to provide comprehensive protection against both low and high pressure conditions, eliminating the need for separate devices and periodic inspections.
Solution Approach 2:
The system continuously monitors water pressure through pressure sensors and flow conditions through flow sensors, feeding this information back to the controller. The controller automatically adjusts the isolation valve position based on real-time feedback, enabling dynamic protection against varying pressure extremes and eliminating the need for manual inspection and adjustment.
2Productivity
If the plumbing system remains connected to the water supply, then water availability is maintained, but contamination risk increases during pressure extremes
Solution Approach 1:
The isolation valve is dynamically controlled based on real-time pressure and flow conditions rather than being statically open or closed. The controller continuously adjusts the valve position to maintain water availability when conditions are normal while automatically isolating the system when pressure extremes or contamination risks are detected, optimizing both water availability and safety.
Solution Approach 2:
The controller acts as an intermediary between the water supply and the plumbing system, using sensor data to intelligently decide when to allow water flow and when to isolate the system. This intermediary control mechanism enables the system to maintain water availability during normal operation while preventing contamination during adverse conditions.
3Reliability
If the system automatically isolates during pressure extremes, then contamination is prevented, but manual intervention is required for system restoration
Solution Approach 1:
The system is fully automated and self-serving. Pressure sensors and flow sensors continuously monitor system conditions, and the controller automatically opens or closes the isolation valve based on detected pressure extremes or contamination risks. When normal conditions are restored, the system automatically resumes water flow without requiring manual intervention, making operation as simple as turning a key switch.
4Measurement precision
If pressure monitoring is continuous, then pressure extremes are detected early, but system complexity increases
Solution Approach 1:
The controller serves multiple functions: it processes data from pressure sensors, monitors flow sensor signals, controls the isolation valve, and provides user interface functionality. By integrating these diverse functions into a single controller unit, the system achieves continuous precise pressure monitoring without proportionally increasing overall system complexity.
Solution Approach 2:
The pressure sensing, flow sensing, valve control, and user interface functions are merged into an integrated isolation device. This consolidation reduces the number of separate components and simplifies installation and operation, making the continuous monitoring capability more accessible despite the sophisticated functions it provides.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively preserves clean water by isolating the plumbing system from contaminated water, eliminating the need for purging and boiling water advisories, and automatically detecting and alerting on high pressure issues that could damage plumbing components, thus protecting the system from both low and high pressure extremes.
Implementation Method 1
The first water pressure sensor, which is coupled to the housing, senses a water pressure of water flowing through the water supply line and outputs a first measurement signal
Implementation Method 2
The second water pressure sensor, which is coupled to the housing, senses water pressure of water flowing through the plumbing system and outputs a second measurement signal
Implementation Method 3
The flow sensor senses a flow of water in the isolation device and outputting a third measurement signal
Implementation Method 4
The main valve is electrically-controllable. The controller performs a main valve control algorithm that sends one or more control signals to the main valve to cause the main valve to be placed in an opened position or a closed position
Data Source
AI summary
An isolation device and method are provided for isolating a plumbing system of a premises from a potable water source if permissible input water pressure parameters are violated. After the plumbing system has achieved a desired input water pressure, the isolation device places the plumbing system in an isolated state and only removes the plumbing system from the isolated state if the isolation device detects a demand for water from the plumbing system and if the isolation device determines that permissible input water pressure parameters are not being violated. Once the demand no longer exists, the isolation device returns the plumbing system to the isolated state.